咪唑啉衍生物与硫脲之间的缓蚀协同效应研究  

The Inhibition Synergistic Effect Between Imidazoline Derivative and Thiourea

作　　者：赵景茂[1] 刘鹤霞[1] 狄伟[1] 左禹[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《电化学》2004年第4期440-445,共6页Journal of Electrochemistry

基　　金：国家重点基础研究发展规划 (G1 9990 6 50 )资助

摘　　要：　应用失重法、动电位扫描法、X射线光电子能谱(XPS)研究了咪唑啉缓蚀剂和硫脲复配后对碳钢在CO2盐水溶液中的缓蚀协同作用.实验表明,咪唑啉和硫脲之间存在着良好的协同效应,二者复合后对CO2腐蚀有较好的抑制作用.经XPS检测,试样表面吸附膜有N、S元素存在,而且,于接近基体处,S元素含量相对较高;而在溶液界面处,则N元素含量较高.据此推断缓蚀剂和硫脲在钢样表面可能形成"包含络合物",从而使缓蚀剂膜更加致密,缓蚀效果也更好.The inhibition synergistic effect between imidazoline and thiourea for carbon steel in CO_2 saturated brine solution was investigated by using weight-loss method, polarization curves measureament and XPS. The results showd that the inhibition efficiency increased significantly when imidazoline derivative was added as a corrosion inhibitor in the solution together with thiourea. The N and S atoms in the inhibitor film adsorbed on the surface of carbon steel, and N atoms predominated in the film near the solution and decreased gradually with the film depth and finally S atoms were the major element in the film near the matrix. It was concluded that imidazoline and thiourea could form a cage complex which adsorbed on the surface of steel and provided a compact film and a better inhibition.

关 键 词：缓蚀协同效应 咪唑啉衍生物 缓蚀剂 失重法 钢样 缓蚀效果 CO2腐蚀 硫脲 X射线光电子能谱(XPS) 溶液界面 

分 类 号：TG174[金属学及工艺—金属表面处理]